Ore-concentrator.



J. A. BRENT.

ORE CONCENTHAIOR.

APPLICATION men MAR. I, l9l6. RENEWED JULY 22,1918.

1,295,960. Patented Mar. 4,1919.

3 SHEETS-SHEET I.

J. BRENT.

ORE CONCENTHATOR.

APPL'ICATION man MAN 1. ms. RENEWED JULY 22.1918.

Patented Mar. 4, 1919.

3 SHEETS-SHEET 2 Patented Mar.

:1 SHEETS H EU a. I

m. k a

UNITED STATES PATENT OFFICE.

- Speiflcation of Letters Patent.

Patented Mar. 4, L919.

To all'w hom it may concewn:

Be 'it known that'I, JAMES- A. BRENT, a citizen of the United States, residing-'et san Francisco, in" the county of Sam-Francisco and State of CalifornimUhave invented-peertainnew and usefulllmprovements in (Dre- Concentrators, of which thefollowing is a specification.

My invention relates to an improvement in ore concentrators, and the objeot is to provide a simple means 0f adjustment: of the rifiles "to adept them to varying conditions of work-and materiahbeing treated; and it consists in the 'main ofa, flexible adjustable rifile, the transverse inclination and longitudinal twist of which may be adjusted and varied to suitthe/ requirements.

In the accompanyin drawings Figure 1 is a VleW'flIlf perspective of the frame showing several of my improved tables: suspended therein Fig. 2 18 3,? plan view of one 'ofthe'=details;

Figs. 3 K and 4 are enl'arged side: elevations showing theedjusteble side of the F Billie, Eigv3 with the rifile adjusted :to- .Ii't-s lower position, and Fig. 4=ehowingit partly down and partly raised;

Fig; 5 is an enlarged view taken from the lower end of the machine;

Figs. 6' and Tare er0ss-seetional details on a still larger scale; and

Fig; 8 is a perspective showing the lower endsof the rifiles.

A,; represents at frame or. snperstruetnre; B, is thelheadimotion; O is a beamor bolster suspended; in any approved manner and" to thisrare connected the-tables 1, 2, 3 and 4, or as niany as the frame is eonstmltrted t0 1 aooommodartey any approvedemeansi of-eonnection with the bolster and: suspension from the frame being adopted. As this frame is no pert of the present: invention, -it'' iv ill-' be unnecessary tor go further into details.

A5 one teble is a type of allyitmilllbe necessary todefiellibeone only.

'iWlriile the :general shapeamightbe varied indefiiiitel an approved fern]! is-athateillus- *treted in ig. *2,- in *Whifilnhhfitflhlfleififidllally wwidens r tdward the ebmentrsdies rsdiseharge endiatthe rightglthesheadflnmien end at the leiu being: eheesmaller. i'lhreeiisides are surrounded why the uupetaliding ea es 5, 5, whereas the remaining ri litelialld go is open for: the escape of: but "thee-cemenvitraies and -the I-gemgue at mtheir 4-: difiwent areas. The head-motion fi'islartteehed at the 1 smaller or-rleft-harid end, as illustrated in 'Figs. hand 2.

r The niflles, iwhiclr constitute the essential vpart of my" improved concentrator, occupy Y an area preferably extending throughout :thevlength of -the table; (es'shown in Fig. '2) commencing a few inches from the upper or fBGd SiQlBpWlllOh is the uppermostside, (as 'illustretedein Fig. 2) thei table being of the type which is tiltedsidewise and reciproeetedi-lengthwise :imorder to -give the metellios ar'progressive endwise feed lengthwise ef the riflles, and to allow a side-wesh of the water used in the process of concentration.

The riffles oornprise in the main two parts, namely the matched or tongueegrooved strips 7 (asshown better in Eigs. 5, -6,- and v7). "lA iter :fittingithese together, they are securedlay? lHlBHIlS of the; bolts 8 I which extend theretlrrough, and which are pleeed ut'ilrtervals ef! about twelve 'inehes'apart throughout the length ofthe table, (as in- 'dieated I bywdotted :lines in Eigri2f al'ld' as shown'in sec'tion iin F'igs. 3'efid 4).

These strips? are supported on transversely arranged channel irons 9; to whinh :the strips aresemired ibyobolts 10, {as shown in Eig. 3). Over the top ofi' each stnip 7, the flexible; adjustable rifles R are secured. These are preferably made of sheet-coppeigwend eonsist oi the dander central portion: 11 and the t-wootflanges l2 a-nd la3. llhe width of 68.611: riflle approximately comesponds with the width of its eonresponding stri 7 to which it -is seoured, and adjusteb y -connected at one edge, (esishown-very bleerly in Figsifiland 6). Theflange 12iat theright is secured rigidly to one edge'lof the strip 7, to which it is attaehed" by a SCIG'W! ineil, -01 equivalent meens 14, t and the opposite flange '13 is. provided 'with slots 15, which receive and straddle the bolts 8 (as: shown ineFigsa3 Hind -4:) the object of hwhich is readily understood, namely to edmit of the r-ifileebeingii adjusted utonmeirely flhenge the Mine linetion; of angle: eof the lend a( as: shown {in 3,. 5, (hand) 7.);011 togiwe "it-not only is 61m e ofimnglefibut also nermitiofi e twistsingre fist-merits (as shewmtin, Elgghwhat i-isl fio-fiy totadjust it so! that the eleivlmon -of writseadjustwble aside 'ser edgenjmey wary idhleug'hout :thedengtlmofthe r ifile, which is SBmBbHEBS-qlfitB desira'ble.

4 Ms mndm'stoed, )ofl coumeethat oneredge,

namely the edge having the flange 12 is rigid, in other wonds the adjust the upper edge 'ofthishanget rough t medium of the riiile, the spring l1h sheet copper forming the riffle admitting of stmenh. a

he a justment isdone by means of a gage; (not shown) which is extended along a.

the edges of the riffies at a time either in the construction or re-adjustment of the viable when the nuts 16 on the bolts 8 are st,then thenuts are screwed upon the loosened, and after these riflesare all ad Vjusted with thestrips 7 7, held by the bolts 18 RI'Id thBIIUtSIG sufliciently tight to create aifrictional contact to'hold the rifiles where bolts,:drawing the strips and riiilesinto tight and rigid contact with one another, thus holding the riflies and their strips rigidly in place as a solid body, until action may occasion loosening them up and're-adjusting.

In this way, it is also ossible to easily apply a new riflie or ri es at any time,

should one become worn or defective or require a change of angle or twist to suit a special condition of concentration. Along the lower edge of each riflle, a

.::groove 17 is formed, the purpose of which is tocatch the veryfinemetallics, holding wrthemina sheltered position beneath the *1 overhang or ledge 18 formed in'the'riffie ira'bove, (as clearly illustrated in Fig. 6). E AifiihlS position, the very fine particles which require protection are sheltered almost entirely from side-Washof water flowing transversely over the riflies, there being just enough splash and backfiow to clean ofl the gian ueyand yet leavetlie 'metallics undisturbed, so that they settle quickly and travel down to the concentrates discharge end at the right.

.The riffles terminate at the concentrates 1 d'iscl'nitrge; end of thetable in'wingslfi, which project'a-trifle beyondtheend of the table,

'fronrtheiends of the irifiles from thesides i'wash-dnwn thefslope oftthe table;

- ':eaught, and from whichxthey "are: conveyed afld thus xprotect;rtheametallios discharging dthroughstdthe concentrates. discharge Glid'EfOfi the rift'alfileu V .t i 1 i ."fkwirelativelysmooth spacesfllis formed at .5; the opposite" edgerofi the: table,'rovenwhich ritheergangue to"idisgfllarger. a "wrought-111m rd 0pdatormerb:by ;.the"sheetmetal 1 iashown in i 8%; portion; 521,;

sol-tinged ediafiggal :22 talilesiaxt this lppint ias =52); thenfeed endroat. this old'wsa or settlers 225'; al enatctheyribei new a l. t. -J1MLVsU-M, .t r it The table is tilted to the desired inclinatio n ,n s is ngell, understood, by suitable adus'tin'ents on thfieme A of the machine. il he -table is reciprocated at any desired speed. The side-wash of water clears the metallics of the gangue by floatin the gangue ofl? while the metallicssettle a most instantly either in thachannehflt), or on the first two or three rifHes, where, by reason of the adjustment of these riflles, it is held during its travel throughout the length of thetable. I

"A very large percentage ot the total separation therefone'takesplace at the feed end, and almost instantly upon the material reaching the surface of 'the table. Therefore, long before the dischargeend of the table shall have been reached, the gangue has been thoroughly separated from the metal lics, and so far as actual separation is concerned, the major part has been com pleted long before the material has traveled half the length of the table but, nevertheless, to insure the greatest eliiciency and capacity of the table, the whole length provided is desirable as is readily understood.

I claim-z 1. In a concentrator, a transversely bendable sheet-metal rifiie extendinglengthwise thereof colnprisinga land having-a flange at each edge, the land having a groove formed longitudinally approximately at the juncture with one flange and an overhang formed approximately atfthe juncture of the opposite edge of-the land with the other flange and means forvariably bending the rifile longitudinally of the table.

2. In a concentrator, a transversely bendable sheet metal rifile extending lengthwise thereof comprising a central nd with a flange throughout its length at each edge, one flange having means whereby it is rigidly secured to the table and the other flange having means wherebyfit may be avariably vertically adjusted with relation toand longitudinally of the table. 3; In a concentrator, thecombination'with r a strip, of a flexible 'riffle comprising a land for; securing one 5 flange fixedly to one edge of'th'e strip and theother flange adjustably to the' other edgeof thestrip'at'difi'erent elevations throughout its length, whereby the varied throughout itsklengithg In a'coneentratomithenombinationwith 'pluralit :tuf parallel :'.:st1"ips, of Iflexible l at ritnagsverse yiihelidable "sheet metal rifles; ex-

tending lengthwise thereof i 'each comprising we danfd mlithctzwerifianges, sohe 'flangeinfveach ehiifllecpe'iinaneiitliytzseciiredirtoi one? side of a and 'fienges' at each edge "thereof; and means transverse elevation ofi the land may be ifiniinderttreathnentiis fedflpon'tlimtableiht 24Jnstui3ph anduineans rrdnawiuhg the stripsito- 1,2o5,9eo

gether to frictionally hold the adjustable flanges in place where set.

5. In a concentrator, the combination with strips, running lengthwise thereof of longitudinal riflles made of sheet-metal each comprising a land and two flanges, one of which is permanently secured to one edge of each strip, and the other variably adjustably connected with the opposite edge of each stri whereby to vary the inclination of the rim along its length.

6. In a concentrator, the combination with strips, of rifiles made of sheet-metal each comprising a land and two flanges, one of which is permanently secured to one edge of a strip, the other adjustably connected at varying elevations with the opposite edge of each strip, and common means for securing said strips and flanges rigidly in place.

7. In a concentrator, the combination with cross-beams and strips secured thereon of sheet-metal riffles each having one edge fixed and the other edge adjustably connected with the strips at varying elevations.

8. In a concentrator, the combination with cross-beams and strips secured thereon, of sheet-metal rifiles adjustably connected with the st i s, and common means for holding said ri es in their adjusted position.

9. A concentrator table having a plurality of riflies extending throughout the length of a central belt of the table, with relatively smooth spaces on either side, one of which forms a channel for the metallics, and the other a discharge for the gangue, and settlers placed diagonally across the feed end of one of said smooth spaces.

10. In a concentrator, the combination with a table, of flexible hollow riflles thereon, the ends of which terminate in verticallydisposed wings which extendbeyond the end of the table.

11. In a longitudinally reciprocating concentrator table which gradually widens from the feed to the discharge end, and which has three edges raised above the working surface of the table, a set of riffles extending in the direction of the stroke and so disposed on the surface of the table that a relatively smooth surface is located on each side thereof, so that both concentrates and gangue discharge at the same end of the table, one of said smooth surfaces radually increasing in area toward the discharge end for the escape of the gangue, and settlers disposed diagonally across the feed end of the lower smooth surface.

In testimony whereof I aflix my signature.

JAMES A. BRENT.

Copies of this patent may he obtained for five cents each, by addressing the "Commissioner of Patents, Washington, D. 0. 

